JP2003019504A - Apparatus for suppressing play in rolling mill - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a play suppressing apparatus for rolling mills with which the deformation of a roll chock is minimized in such a manner that the clearance between a chock and a housing is eliminated, the application to an existing mill is easy and a satisfactory touch area is easily secured. SOLUTION: This apparatus is provided with a planar liner 12 which is inserted between the roll chock and the housing, a planar piston 14 which is housed in a recessed part of the liner and is made projectable in the thickness direction, a flexible diaphragm plate 16 which is inserted between the piston and the liner and whose outer circumferential part is fixed liquid-tight to the liner, and a pressurized oil supplying means 18 for supplying pressurized oil between the diaphragm plate and the liner.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlash eliminating device for eliminating a gap between a chock and a housing of a rolling mill.

[0002]

2. Description of the Related Art FIG. 5 shows a conventional four-high rolling mill (4Hi M
It is a schematic diagram of ill). In this figure, 1 is a rolled material, 2 is a work roll, 3 is a backup roll, 4 is a housing, 5 is a work roll chock (axle box), and 6 is a backup roll chock. is there.

[0003]

The roll chocks 5 and 6 (for WR and BUR) of the above-described four-high rolling mill have the structure shown in FIG.
As shown in, there is a gap of about 2 to 3 mm in the line direction. This gap is indispensable for the replacement of the roll chocks 5, 6 and cannot be completely eliminated. But,
Due to this gap, the work roll 2 is loosened and the rolled material 1
Conventionally, there have been problems associated with roll behavior such as impeding the sheet passing property, limiting the reduction ratio due to roll vibration, and causing chatter marks on the rolled material 1.

In order to solve this problem, for example, as disclosed in Japanese Patent No. 3072681 and Japanese Patent Application Laid-Open No. 6-31308, a cylinder is incorporated in the housing to cross the work rolls. Means for pressing on one side to kill the gap have already been disclosed. However, such conventional means have the following problems.

(1) Since a hydraulic cylinder is incorporated, there are many modification ranges such as processing of the housing and securing of a cylinder space, which is possible at the time of new installation, but it is difficult to apply to an existing mill (rolling machine). (2) Due to the structure, the contact area of the hydraulic cylinder cannot usually be large, so that the rod of the hydraulic cylinder locally hits the chock, and the local surface pressure deforms the chock or damages the bearing incorporated in the chock. Problems are likely to occur.

The present invention was devised to solve such problems. That is, the object of the present invention is to eliminate the gap between the chock and the housing, to easily apply it to an existing mill, and to easily secure a sufficient contact area, thereby minimizing the deformation of the chock. It is to provide a rattling eliminating device for a rolling mill which can be suppressed to a low level.

[0007]

According to the present invention, a plate-shaped liner (12) sandwiched between a roll chock and a housing, and a plate-shaped liner (12) housed in a recess of the liner and capable of protruding in the thickness direction. The piston (14), a flexible diaphragm plate (16) sandwiched between the piston and the liner, and the outer edge portion of which is liquid-tightly fixed to the liner, and a pressure applied between the diaphragm plate and the liner. And a pressure oil supply means (18) for supplying oil.

According to the above-mentioned constitution of the present invention, the backlash killing device (10) of the present invention comprises a plate-shaped liner (12), a plate-shaped piston (14) incorporated in the liner, and a diaphragm plate ( 16) and the pressure oil supply means (18), the whole can be replaced with a conventional liner, inserted between the roll chock and the housing, and fixed to the roll chock or the housing. Therefore, even in the case of an existing mill, it can be easily applied with almost no modification by simply replacing the conventional liner with the rattling eliminating device of the present invention.

Further, a flexible diaphragm plate (1
The outer edge of 6) is fixed to the liner in a liquid-tight manner, and the pressure oil is supplied to the liner to expand the piston, which causes the piston (14) to project in the thickness direction. ) It can be easily installed in the recess of the liner.

Further, since the piston (14) itself does not need a pressure oil seal structurally, it can be formed into a free shape corresponding to its contact surface, and the diaphragm plate (16) is slightly larger than the piston. Since the shapes can be made almost the same, the contact area of the piston can be easily increased and the contact pressure of the contact surface can be reduced. Therefore, the deformation of the chock due to the surface pressure is reduced, and the damage of the bearing incorporated in the chock can be significantly reduced.

According to a preferred embodiment of the present invention, the roll chock is a work roll chock or a reserve roll chock, which is provided on the inlet side and / or the outlet side thereof and is provided on either the upper side or the lower side. To be

With this configuration, the rattling killing device (10) of the present invention can be freely inserted into the work roll chock and the reserve roll chock at the entrance side and the exit side, and any desired position above and below, and is easily remodeled. And, the construction period can be shortened.

The liner (12) is formed so as to be applicable to any of a housing liner, a chock liner and a cylinder block liner. Even with this configuration, any of the housing liner, the chock liner, and the cylinder block liner can be backlashed by simply replacing it with the backlash removal device of the present invention.

The piston (14) has a round shape, a rectangular shape, an elliptical shape or other irregular shape corresponding to the contact surface, and the diaphragm plate (16) is slightly larger than the piston and has substantially the same shape. , Is preferred. With this configuration, the contact area of the piston can be easily increased and the contact pressure of the contact surface can be reduced, so the deformation of the chock due to the contact pressure is reduced and damage to the bearing incorporated in the chock can be easily prevented. it can.

The pressure oil is supplied from the pressure oil supply means (18) to switch the cylinder output when the rolled material is caught and when it is rolled.
Alternatively, it is preferable that the pressure is sealed during the biting and the set pressure is set after the biting. With this configuration, the backlash of the rolling mill can be eliminated when necessary, and at other times, a gap can be formed between the backlash eliminating device of the present invention and the roll chock or the housing, so that the rolls can be exchanged smoothly.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. In addition, in each figure, the common part is denoted by the same reference numeral, and the duplicated description will be omitted.

FIG. 1 is a block diagram of a horizontal rolling mill incorporating the rattling eliminating device of the present invention. In this figure, the horizontal rolling mill is a conventional four-high rolling mill, and the rattling killing device 10 of the present invention is provided on both the input side and the output side of the work roll chock 5 and the reserve roll chock 6 and both above and below. There are 6 sets in total. The present invention is not limited to this configuration,
At least one of the work roll chock 5 and the backup roll chock 6 may be provided on the entrance side and / or the exit side, and may be provided on either the upper side or the lower side.

FIG. 2 is a view taken along the line AA of FIG. As shown in this figure, the entire shape of the rattling killing device 10 of the present invention is equivalent to a conventional housing liner, chock liner, or cylinder block liner, and instead of these, bolts are attached to the roll chocks 5, 6 or the housing 4. It is designed to be fixed at 11 or the like.

FIG. 3 is a sectional view taken along the line BB of FIG. As shown in this figure, the rattling killing device 10 of the present invention
Includes a plate-shaped liner 12, a plate-shaped piston 14, and a thin diaphragm plate 16.

The plate-shaped liner 12 is provided on any of a conventional housing liner, chock liner, or cylinder block liner and is formed so as to be replaceable with them, and fixed to the roll chocks 5, 6 or the housing 4 with bolts 11 or the like. Roll chock 5, 6 and housing 4
Sandwiched between. Further, the liner 12 has a recessed portion in which the piston 14 is housed. This recess is
In this example, it includes a penetrating portion for accommodating the piston 14 and a support plate 13 that closes the back surface (mounting surface side) thereof. The support plate 13 is a thin metal plate, and the outer edge of the support plate 13 is fixed to the liner 12.

The plate-shaped piston 14 has a thickness that does not protrude from the thickness of the liner 12, is accommodated in a recess provided in the liner 12, and protrudes in the thickness direction to the extent that a gap is eliminated from that thickness. It is possible. In this example, the outer peripheral portion of the piston 14 engages with the inner edge portion of the concave portion of the liner 12 so as not to protrude beyond a predetermined protrusion amount (for example, 2 to 3 mm).

FIG. 4 is an enlarged view of portion C in FIG. In this drawing, (A) shows the contracted state of the piston 14, and (B) shows the projected state. The diaphragm plate 16 is a flexible thin metal plate or a rubber plate, and is sandwiched between the piston 14 and the liner 12, and the outer edge portion thereof is the liner 1.
It is liquid-tightly fixed to 2. In this example, the seal member 15 (for example, an O-ring) seals between the diaphragm plate 16 and the liner 12, but if necessary,
It may be welded or glued. When using a rubber plate, the rubber plate itself may also serve as the seal member.

The backlash killing device 10 of the present invention further includes a diaphragm plate 16 and a liner 12 (in this example, the support plate 1).
3) A pressure oil supply means 18 for supplying pressure oil is provided. The pressure oil supply means 18 is composed of a hydraulic device (for example, a hydraulic unit) provided outside the rolling mill and its piping line. The pressure oil is supplied from the piping line to the space between the diaphragm plate 16 and the support plate 13 through the flow path 12a provided in the liner 12, and the diaphragm plate 16 is illustrated in FIG. 4 (B). It is inflated upward and the piston 14 is projected from the liner 12 to eliminate the gap between the roll chock and the housing.

According to the above-described configuration of the present invention, the backlash killing device 10 of the present invention is provided with a plate-shaped liner 12, a piston 14 incorporated in the liner, and a diaphragm plate 1.
6 and the pressure oil supply means 18, the whole can be replaced with a conventional liner, inserted between the roll chock and the housing, and fixed to the roll chock or the housing. Therefore, even in the case of an existing mill, it can be easily applied with almost no modification by simply replacing the conventional liner with the rattling eliminating device of the present invention.

Further, the outer edge portion of the flexible diaphragm plate 16 is liquid-tightly fixed to the liner, and the pressure oil is supplied between the outer edge portions of the flexible diaphragm plate 16 to swell, thereby causing the piston 14 to project in the thickness direction. Relatively thin (eg 20-50
It can be easily assembled in the recess of the liner.

Further, since the piston 14 itself does not need a pressure oil seal structurally, it can be formed in a free shape corresponding to the contact surface, and the diaphragm plate 16 is slightly larger than the piston and has substantially the same shape. Therefore, the contact area of the piston can be easily increased, and the contact pressure of the contact surface can be reduced. Therefore, the deformation of the chock due to the surface pressure is reduced, and the damage of the bearing incorporated in the chock can be significantly reduced.

The present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention. For example, in the example described above, the horizontal rolling mill is a four-high rolling mill, but the present invention is not limited to this, and the same applies to a six-high rolling mill having an intermediate roll, other horizontal rolling mills, and vertical rolling mills. Can be applied to.

[0028]

As described above, the backlash killing device 10 of the present invention can be remodeled by simply replacing it with a conventional liner, and by supplying pressure oil to project the piston in the thickness direction of the liner. With this, you can kill the backlash of the rolling mill. Therefore, (1) the liner can be remodeled only by exchanging the liner, the processing of the housing is unnecessary, (2) the conventional rolling can be performed even if the backlash killing device of the present invention fails, and (3) the work period is shortened. (4) The chock contact surface is large and there is no local contact.

Therefore, the backlash eliminating device of the rolling mill of the present invention can eliminate the gap between the chock and the housing, can be easily applied to the existing mill, and can easily secure a sufficient contact area. This has an excellent effect such that the deformation of the chock can be minimized.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a horizontal rolling mill in which a backlash killing device of the present invention is incorporated.

FIG. 2 is a view on arrow AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is an enlarged view of portion C in FIG.

FIG. 5 is a configuration diagram of a conventional four-high rolling mill.

[Explanation of symbols]

1 rolled material, 2 working rolls, 3 retaining rolls, 4 housing, 5 working roll chock, 6 retaining roll chock, 10 rattling killing device, 11 bolts, 12
Liner, 12a flow path, 13 support plate, 14 piston, 15 seal member, 16 diaphragm plate, 18
Pressure oil supply means

Claims (5)

[Claims] 1. A plate-shaped liner (12) sandwiched between a roll chock and a housing, and a plate-shaped piston (14) housed in a recess of the liner and projectable in the thickness direction.
And a flexible diaphragm plate (16) sandwiched between the piston and the liner, the outer edge of which is liquid-tightly fixed to the liner, and pressure oil is supplied between the diaphragm plate and the liner. A rattling eliminator for a rolling mill, comprising: a pressure oil supply means (18). 2. The roll chock is a work roll chock or a reserve roll chock, and is provided on the entrance side and / or the exit side of the work chock and on either or both of the upper and lower sides. The rattling eliminating device for a rolling mill according to Item 1. 3. The rattling eliminating device for a rolling mill according to claim 1, wherein the liner (12) is provided on any one of a housing liner, a chock liner, and a cylinder block liner. 4. The piston (14) has a round shape, a rectangular shape, an elliptical shape or other irregular shape corresponding to the contact surface, and the diaphragm plate (16) is slightly larger than the piston and has substantially the same shape. The rattling eliminating device for a rolling mill according to claim 1, wherein 5. Pressure oil is supplied from the pressure oil supply means (18).
2. The rattling eliminating device for a rolling mill according to claim 1, wherein the cylinder output is switched between when the rolled material is biting and when the rolling material is rolled, or when the biting is performed, the pressure is sealed and the set pressure is set after the biting.